Held in private collections for more than 200 years, jewellery that once belonged to France’s ill-fated Queen Marie Antoinette has gone on display in Dubai ahead of its planned auction in Geneva next month.

Described by British auction house Sotheby’s as “one of the most important royal jewellery collections ever to come to auction,” the seven pieces are part of an exhibition entitled “Royal Jewels from the Bourbon Parma family” that also includes other items from the storied dynasty’s rich history.

A member of Sotheby’s staff holds a pearl and diamond pendant once belonging to Queen Marie Antoinette of France on display at Sotheby’s in Dubai, UAE, October 9, 2018. Picture taken October 9, 2018. REUTERS/Christopher Pike

A member of Sotheby’s staff adjusts the painting ‘Study of the Head of a Young Man’, by Dutch painter Rembrandt van Rijn on display at Sotheby’s in Dubai, UAE, October 9, 2018. Picture taken October 9, 2018. REUTERS/Christopher Pike

A woman looks to jewels once belonging to Queen Marie Antoinette of France at Sotheby’s in Dubai, UAE, October 9, 2018. Picture taken October 9, 2018. REUTERS/Christopher Pike

A member of Sotheby’s staff reaches for a pearl and diamond pendant once belonging to Queen Marie Antoinette of France on display at Sotheby’s in Dubai, UAE, October 9, 2018. Picture taken October 9, 2018. REUTERS/Christopher Pike

A member of Sotheby’s staff adjusts the painting ‘Study of the Head of a Young Man’, by Dutch painter Rembrandt van Rijn on display at Sotheby’s in Dubai, UAE, October 9, 2018. Picture taken October 9, 2018. REUTERS/Christopher Pike

A man looks to jewels once belonging to Queen Marie Antoinette of France at Sotheby’s in Dubai, UAE, October 9, 2018. Picture taken October 9, 2018. REUTERS/Christopher Pike

Jewels once belonging to Queen Marie Antoinette of France are seen at Sotheby’s in Dubai, UAE, October 9, 2018. Picture taken October 9, 2018. REUTERS/Christopher Pike

The French queen’s jewels on view include a 49-karat natural pearl and diamond pendant, as well as necklaces, brooches, and earrings valued in total at between $1.5 and 3 million.

The collection, which belongs to the Bourbon Parma family, also includes a monogram ring with woven strands of Marie Antoinette’s hair enclosed.

Edward Gibbs, Sotheby’s chairman for the Middle East and India, said the Middle East had become a highly lucrative market, with a 62 percent increase in buyers over the past five years, particularly younger customers.

“It is a two-way street. We are here both to sell art and also to source it,” said Gibbs. “It’s both a regional hub and an international center.”

After Dubai, the jewellery will also be exhibited in several other cities including London, New York and Hong Kong before going under the hammer in Geneva in November. The tour is expected to arouse the interest of potential wealthy buyers in the Gulf and elsewhere ahead of the auction.

Marie-Antoinette, an Austrian archduchess by birth, was the wife of King Louis XVI of France, of the Bourbon dynasty. Both were executed by guillotine in 1793 after the French Revolution.

The queen’s jewellery was wrapped up and smuggled out of France to Vienna for safe-keeping during the Revolution and remained in the Bourbon Parma family.